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Q:

Which   one   of   the   following   is   not   a semiconductor?

A) Silicon B) Germanium
C) Quartz D) Gallium arsenide
 
Answer & Explanation Answer: C) Quartz

Explanation:

Semiconductors are the basic materials used in the present solid state electronic devices like diode, transistor, ICs, etc. 2. Lattice structure and the atomic structure of constituent elements decide whether a particular material will be insulator, metal or semiconductor. Semiconductors are elemental (Si, Ge) as well as compound (GaAs, CdS, etc.). Silicon, Germanium, Gallium Arsenide are semiconductors, but Quartz is an insulator.

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Filed Under: Chemistry
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Q:

Most viruses that infect plants possess

A) single-stranded DNA B) single-stranded RNA
C) double-stranded DNA and RNA D) double-stranded RNA only
 
Answer & Explanation Answer: B) single-stranded RNA

Explanation:

Generally viruses that infect plants have single stranded RNA. Viruses infecting animals have double stranded RNA or DNA. Viruses which infect bacteria have double stranded DNA.

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Q:

In the following question, out of the four alternatives, select the word similar in meaning to the word given.

Cantankerous

A) Humorous B) Quarrelsome
C) Remorseful D) Dullness
 
Answer & Explanation Answer: B) Quarrelsome

Explanation:
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Q:

In the following question, out of the four alternatives, select the word opposite in meaning to the word given.
Clandestine

A) Abrupt B) Illicit
C) Open D) Wary
 
Answer & Explanation Answer: C) Open

Explanation:
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Q:

In the following question, out of the four alternatives, choose the alternative which best expresses the meaning of the idiom/Phrase.

 

Too many Chiefs and not enough Indians.

A) a proud gathering B) an inefficient situation
C) an anti-national meeting D) a top-level meeting
 
Answer & Explanation Answer: B) an inefficient situation

Explanation:
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Q:

In the following question, out of the four alternatives, select the word opposite in meaning to the word given.
Bifurcate

A) Combine B) Ramify
C) Furcate D) Diverge
 
Answer & Explanation Answer: A) Combine

Explanation:
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Q:

In the following question, four words are given out of which one word is correctly spelt. Select the correctly spelt word.

A) jukstapose B) jaxtapuse
C) juxtapose D) jaxtapose
 
Answer & Explanation Answer: C) juxtapose

Explanation:
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Q:

In the following question, out of the four alternatives, select the word similar in meaning to the word given.

Stymie

A) Explicate B) Abet
C) Impede D) Aid
 
Answer & Explanation Answer: C) Impede

Explanation:
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